Combined micrometer and scale.



V. R. HELIN.

COMBINED MICROMETER AND SCALE.

APPLICATION FILED MAY 4, 1912.

1 ,l 53,785., Panted Sept. 14, 1915.

VERNIE R. I-IEIJIN, OF MINNEAPOLIS, MINNESOTA.

COMBINED MICROMETER AND SCALE.

Specification of. Letters Patent. Pgttgnted Sept 14, 1915 Applicationled May fi, 1912. Serial No. 695,121.

To all 107mm t may concern Be it known that I, Viinrvm It. HELIN, acitizen of the United States, residing at Minneapolis, in the county ofHennepin and State of Minnesota, have invented new and usefulImprovements in Combined Micrometers and Scales, of which the followingis a specification.

An object of the invention is to provide a device adapted to be employedas a scale, for measuring depths and for determining interior andexterior dimensions.

The invention embodies, among other features, a plurality of members,one arranged to slide on the other, with a scale provided on one of themembers, the said members being adapted to coperate for the purpose ofdetermining inside and outside measurements, the readings of which canbe calculated on the scale, one of the said members being adapted formeasuring depths, the resulting depth being readable upon the saidscale.

In the further disclosure of the invention reference is to be had to theaccompanying drawings constituting a part of this specification in whichsimilar characters of reference denote corresponding parts in all theviews, and in which:

Figure 1 is a view looking at the front face of the device, showing thesame employed to determine an inside measurement; Fig. 2 is a similarview showing the .device applied to determine an outside measurement;Fig. 3 is a similar view of the device showing the same in an uprightposition and employed to determine the depth of an article; Fig. d is avertical sectional view of the device taken transversely through theguide head and shank; and Fig. 5 is a vertical transverse sectional viewtaken on the line 5-5 in Fig. 1.

Referring more particularly to the views, use is made of a scale member10 having a finger 11 formed at one end of a shank 12, forming a part ofthe scale member, the said shank being provided with a series ofgraduations 13, a guide head 1a being rigidly secured to the other endof the shank 12 and adapted to slidably receive therethrough amicrometer member 15 with a portion of the guide head projecting to oneside of the scale member from an edge thereof, the said micrometermember constituting a shank 16, said shank being slidably extendedthrough the guide head le and terminating at one v end in a finger 17,spring-like guide plates 18 being secured to both sides of the finger 17and extending in longitudinal alinement with and away from the finger 17to extend across `both sides of the shank 12, the free ends of the guideplates being connected by an adjusting screw 19. Vhen the adjustingscrew 19 is arranged loosely relative to the guide plates it will bereadily understood that the micrometer member 15 can be easily slid onthe shank 12 and guide head llof the scale member 10 and when theadjusting screw is tightened the inner faces of the guide plates willfrictionally engage. the outer face of the shank 12 to retain themicrometer member 15 in rigid position relatively to the scale member10.

The graduations 13 on the shank 12, commence at the edge a of the finger11, and when taking an exterior measurement of a circular article suchas a tumbler 20, shown in Fig. 2, the edge a of the finger 11 and theedge b of the finger 17 will abut against the periphery of the tumblerso that by reading the graduations 13 from the zere mark adjacent theedge a to the reading adjacent the edge b, the exterior measurement ofthe tumbler will be ascertained. The guide plates 18 are preferably madewide enough at the point c to equal the combined width of the fingers 11and 17 at the point CZ, l and, therefore, when it is desired to take aninside measurement the edge e of the finger 11 and the edge f of thefinger 17 are adapted to engage the inner face of the tumbler 2O asshown in Fig. 1, the readingbeing then taken from the Zero mark of thegraduations to the edge g of one of the guide plates 18, this being theinside measurement` of the tumbler` as will be readily understood. Nowwhen it is desired to determine the depth of the tumbler 20 the free endof the shank 16 is mounted to depend in the tumbler with an edge ft ofthe guide head 1i engaging the upper edge of the tumbler and it willthus be readily seen that the distance the shank 16 depends in thetumbler from the edge h will be equal to the distance on the graduations13, from the Zero mark to a point adjacent the edge b of one of theguide plates 18. The guide head 14' is preferably enlarged at one end sothat the edge h will be of sufiicient thickness to permit of morereadily applying my device to a tumbler or the like for the purpose ofdetermining the depth of the same, and the veniently employed forvdrawing right angles, an edge of the shank 16, when taken intoconsideration With a portion of the edge it, being adapted to form aright angle, as Will be readily understood by referring to the views.Thus With the device described the depth of an article can beascertained, the inside and outside measurements of the article can bealso obtained, and by providing the graduations 13, the device can alsobe used in the same manner as an ordinary linear scale, it beingunderstood that the readings of inside measurements, outsidemeasurements and measurements of depth are all ascertained on thegraduations 13.

Having thus described my invention, I claim:V

VIn a combined micrometer and scale, the combination With a scalemember,v of a micrometer member slidable on the scale member, a guidehead carried by the scale member and projecting to one side of the scalemember from an edge thereof, a shank carried bythe micrometer member andpassing slidably through the said guide head, said shank lying flushwith the body of the said scale member, a finger carried by theVmicrometerl member, spaced 'spring-like guide plates, each plate havingone of its ends secured to the-said linger, said plates passing acrossthe faces'of the scale member, an adjusting screw connecting the freeends of the guide plates for clamping the said micrometer member in anadjusted position on the scale member, and a second finger formedintegrally `With thel said scale member atl one end thereof, thefingerof the said -mil crometer member being adapted .to lie flush With thesaid scale member and the said linger thereof. Y Y In testimony whereofI affix my signature in presence of two Witnesses.

VERNIE R. HELI'DLQ YlVitnesses: Q Y I GEORGE A. REINARTS, LEWIS C.GYERTSEN.

Copies of this patent may be obtainedfor five cents each, by addressingthe. Commissioner of Patent Washington, I). C.

